One of President Donald Trump's GOP antagonists, former Sen. Bob Corker, R-Tenn., called a 2020 Republican primary challenge to the president a "good thing for our country."

"Philosophically, you could look at it and say that it would be a good thing for our country should that occur from the standpoint of issues," Corker said at the Time 100 Summit in New York City on Tuesday. "If you had a real primary, where you had someone that was really being listened to, and of substance, things that we were talking about — and I could go through a list of them — they would actually be debated in a real way.

"And that would be a good thing for our country."

Corker, who was once turned down by President Trump for a Cabinet position and then took to challenging the president before deciding against seeking re-election to the Senate, ripped the president for seeking "to divide."

"Typically, to unite people, you have to wish to do so, and I think that currently, the president has not found that to his benefit or to his liking," Corker told Time. "Therefore, he purposely seeks to divide."

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